ALEXANDRIA, Va., July 3 -- United States Patent no. 12,347,397, issued on July 1, was assigned to E Ink Corp. (Billerica, Mass.).

"Method of forming an electro-optic medium" was invented by Peter Carsten Bailey Widger (Nashua, N.H.), Jay William Anseth (Canton, Mass.), Richard J. Paolini Jr. (Framingham, Mass.), Mark Benjamin Romanowsky (Cambridge, Mass.), Jillian Smith (Dorchester, Mass.), Stephen J. Telfer (Arlington, Mass.), Craig Alan Breen (Arlington, Mass.) and Stephen Bull (Windham, N.H.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A variable transmission film may include an electrophoretic medium having a plurality of capsules and a binder, each capsule containing a plurality of electrically charge...